Astigmatism is one of those strange terms that most people don’t understand, so it sounds intimidating when you are told that you have it. It doesn’t help that prescription contact lenses cost significantly more if astigmatism is present. Let’s clear up some of this confusion. Astigmatism describes optical blur that arises when the curvature of an optical surface is “out of round”. This irregular curvature can occur on the cornea or on the lens.
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Optical blurring, ghosting, slight doubling or drop-shadow effects result from having astigmatism. Most people only know they have astigmatism because their eye doctor has measured them for glasses or contacts and has told them they have this condition.